Use of montmorillonite clays as adsorbents of hazardous polluants

Adsorption of humic acid on acid-activated Greek bentonite

“…where C e (mg/L) is the equilibrium concentration of HA in the liquid phase [18,41]. The data obtained from the adsorption of HA on AAS were fitted to the Freundlich model by plotting ln q e versus ln C e .…”

“…The extent of physical changes during the activation process depends on the acid strength, time of treatment, and temperature. In previous papers the efficiency of acid-treated bentonite to adsorb dyes (methylene blue), p-aminobenzoic acid, Cr(VI), Cd(II), to decolorize crude rapeseed oil through removal of b-carotene, and remove colored pigments from crude palm oil has been reported [15][16][17][18][19][20].…”

Aromatic Amines Sources, Environmental Impact and Remediation

“…Activated carbon, fly ash, serpentine, activated alumina, bauxite, clays, zeolites, bentonite and other ecofriendly adsorbent exhibits a good capacity for removing aromatic amine from wastewater (Hocine et al 2004;Kostelníková et al 2008;Oda and Yokokawa 1983;Yadav et al 2011). Recently, other advanced absorbents such as the chemically synthesized polymeric adsorbents and modified with functional groups (Jianguo et al 2005), modified activated carbon (Han et al 2006) and Carbon Nanotubes (CNT) (Yang et al 2008; Al-Johani and Salam 2011) have been proposed.…”

Catalytic degradation of O‐cresol using H2O2 onto Algerian Clay‐Na

“…Several studies have shown that adsorption on clay is easily achievable (Feddal et al., ; Hocine, Boufatit, & Khouider, ; Kausar et al., ; Ramdani, Taleb, Benghalem, Deratani, & Ghaffour, ; Sennour, Mimane, Benghalem, & Taleb, ), and the combination of both adsorption and chemical oxidation processes has also shown a huge capacity for the abatement of wastewater pollutants, which are not biodegradable, have toxic character and/or present high concentrations (Hernandez‐Esparza, Doria‐Serrano, Acero Salinas, & Ruiz‐Trevino, ; Khaki, Shafeeyan, Raman, & Daud, ; Salazar‐Gil, Díaz‐Nava, & Solache‐Ríos, ). In this sense, the catalytic properties of clay for several reactions with industrial applications (hydrogenation, oxidation, and polymerization) were highlighted several decades ago (Bertella & Pergher, ; Saiah, Hachemaoui, & Yahiaoui, ).…”